decot@hpisod2.HP.COM (Dave Decot) (07/20/89)
Replace: main(argc, argv) int argc; char *argv[]; with main(argc, argv, envp) int argc; char *argv[], *envp[]; and your troubles should go away. It is likely that the exec(2) page in your SGI documentation has the explanation of envp. Sounds like SGI has an unusual argument passing method. Dave
dxk@beta.lanl.gov (David M Koon) (08/15/89)
I am trying to port the following code from a Sun( it also works
on a PC with turbo C) to a Silicon Graphics(system V).
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "cffs.h"
main(argc,argv)
int argc;
char *argv[];
{
....
However, on the SGI machine argc is undefined and argv seems to contain
the environmental variables. Does anyone have any ideas as to what is
causing this and how I can fix it? I am compiling in the Sun with
cc fn.c -o fn
and on SGI with
cc fn.c -o fn.
Thanks,
Dave Koon
Los Alamos National Laboratory
dxk@lanl.govgavin@krypton.sgi.com (Gavin A. Bell) (09/06/89)
dxk@beta.lanl.gov (David M Koon) writes: >I am trying to port the following code from a Sun( it also works >on a PC with turbo C) to a Silicon Graphics(system V). >#include "cffs.h" > >main(argc,argv) There was a question exactly like this a couple of months ago. Look for a missing semicolon at the end of cffs.h A missing semicolon probably make the code look like: struct foo {...} main(argc,argv) { ... } ... that is, main is a 'struct foo'. Most compilers don't care, but the Mips compiler used on SGI machines seems to get quite confused. This probably isn't unreasonable, since main() should always be declared either void or int. This has nothing to do with SYSV versus BSD. --gavin
rogerk@mips.COM (Roger B.A. Klorese) (09/06/89)
In article <454@odin.SGI.COM> gavin@krypton.sgi.com (Gavin A. Bell) writes: >A missing semicolon probably make the code look like: >struct foo {...} main(argc,argv) { ... } >... that is, main is a 'struct foo'. Most compilers don't care, but >the Mips compiler used on SGI machines seems to get quite confused. It doesn't get confused; it simply uses a different format for the parameter list when functions return struct. A dummy first entry is added to hold the address of an instance of the appropriate struct into which the return value is placed. Unfortunately, the startup code, which always calls "main" as an int function, expects argc to be there. -- ROGER B.A. KLORESE MIPS Computer Systems, Inc. phone: +1 408 720-2939 928 E. Arques Ave. Sunnyvale, CA 94086 rogerk@mips.COM {ames,decwrl,pyramid}!mips!rogerk "I want to live where it's always Saturday." -- Guadalcanal Diary